body{
    margin: 0;
    padding-top: 30px;
}
header{
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    background-color: black;
}  
#center{
    width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
}
#logo{
    display: inline-block;
    padding: 10px;
}
#logo img{
    height: 10px;
}
#nav-list{
    list-style: none;
    padding: 0;
    margin: 0;
    display: inline-block;
}
#nav-list li{
    display: inline-block;
    padding: 9px;
    margin: 0 15px;
}
.h{
    color: white;
}
#search-box a{
    color: rgba(183, 183, 183);
    display: inline-block;
    text-decoration: none;
    padding: 9px;

}
/* 轮播图 */
#banner img{
    width: 100%;
}
/*  */
main{
    width: 1000px;
    margin: 30px auto;
    display:flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.pro-item{
    width: 490px;
    height: 350px;
    position: relative;
    overflow: hidden;
    margin: 10px 0;
    z-index: -1;
}
.pro-item img{
    height: 100%;
    width: 100%;
}
.intro{
    box-sizing: border-box;
    position: absolute;
    left: 0px;
    bottom: -50px;
    background-color: white;
    width: 100%;
    padding-left: 40px;
    padding-bottom: 20px;
    transform:all 3s;
}
.intro h3{
    margin: 8px 0 4px 0;
}
.intro p{
    margin-top: 4px;
    margin-bottom: 14px;
}
.pro-item:hover .intro{
    bottom: 0;
}


.clear{
    background-image: url(benz.jpg);
    margin: 50px auto;
    width: 1000px;
    height: 400px;
    background-size: 100% 100%;
}
.car-box{
    height: 400px;
    float: left;
    width: 25%;
    border: 1px solid red;
    box-sizing: border-box;
    position: relative;
}
.cc{
    position: absolute;
    left: 40%;
    bottom: 60px;
    margin: auto;
    width: 200px;
    height: 100px;
}
.gt{
    border: 1px solid white;
    border-radius: 50%;
    color: white;
    font-size: 25px;
    height: 30px;
    width: 30px;
    text-align: center;
    margin-bottom: 20px;
}
.ji{
    font-size: 25px;
    color: white;
    font-weight: bold;
}